Defining Locale from module's configuration file in ZF2

set_Locale_ZF2.php

// BookList/Module.php (a custom ZF2 module)
public function onBootstrap(MvcEvent $e)
{
	$translator = $e->getApplication()->getServiceManager()->get('translator') ;
	$translator->setLocale(\Locale::acceptFromHttp($_SERVER['HTTP_ACCEPT_LANGUAGE']))
		->setFallbackLocale('en_US') ; 
}